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Objective Type Set
Online MCQ Assignment
Question Solution
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1. Whichof the following is the correct relatioship between IB and IE?
a) IB = β IE
b) IB = IE
c) IB = (β + 1) IE
d) IE = (β + 1) IB

Answer: d [Reason:] For a BJT, the collector and emitter current are related as IE = (β + 1) IB.

2. For best operation of a BJT, which region must the operating point be set at?
a) Active region
b) Cutoff region
c) Saturation region
d) None of thye mentioned

Answer: a [Reason:] Operating point for a BJT must always be set in the active region to ensure proper functioning. Setting up of Q-point in any other region may lead to reduced functionality.

3. From the given circuit, what is the value of IBQ? a) 47.08 mA
b) 47.08 uA
c) 50 uA
d) 0 mA

Answer: b [Reason:] We know that IBQ = (VCC – VBE)/RB = 11.3/240 uA = 47.08 uA.

4. From the given circuit, what is the value of VCEQ? a) 7 V
b) 0.7 V
c) 6.83 V
d) 7.17 V

Answer: c [Reason:] VCEQ = VCC – ICRC. Hence, VCEQ = 6.83 V.

5. From the given circuit, what is the value of VBC? a) 6.13 V
b) -6.13 V
c) 7 V
d) -7 V

Answer: b [Reason:] VBC = VB – VC = VBE – VCE = -6.13 V.

6. From the given circuit, what is the value of the saturation collector current? a) 5 mA
b) 5.45 mA
c) 4.54 mA
d) 10.9 mA

Answer: b [Reason:] Saturation collector current = VCC/RC = 5.45 mA.

7. In the given circuit, what is the value of IC? a) 2.01 mA
b) 2.01 uA
c) 10.05 mA
d) 10.05 uA

Answer: a [Reason:] β IB = 2.01 mA.

8. In the given circuit, what is the value of VCE? a) 20 V
b) 13.97 V
c) 14.98 V
d) None of the mentioned

Answer: b [Reason:] VCE = VCC – ICRC = 13.97 V.

9. In the given circuit, what is the value of VE? a) 12.01 V
b) 1.01 V
c) 0 V
d) 2.01 V 